prichard



(No Model.) 2 Sheets-Sheet 1.

G. A. PRIOHARD & E. MIGNAULTV VENTILATOR.

110.391. 125. Patented 0013.23, 1888.

w QJWM I 2 Sheets-Sheet 2.

(No Model.)

G. A. PRIGHARD & E. MIG-NAULT.

VBNTILATOR.

No. 391,425. Patented Oct. 23, 1888.

my; W, CJK awn gz ww N4 PETERS; Hutu-Lithographer. Wnlhiqgiun. DC.

Unrre GEORGE A. PRIGHARD AND EUSEBE MIGNAULT, OF NEW YORK, N. Y.

VENTILATOR.

SPECIFICATION forming part of Letters Patent No. 391,4;25, dated October23, 1888. Application filed December 10, 1887. Serial No. 257,525. (Nomodel.)

To aZZ whom it may concern:

Be it known that we, GEORGE A. PRIOHARD and EUSEBE MIGNAULT, of New Yorkcity, county of New York, and State of New York, have invented certainnew and useful Improvements in Ventilators, of which the following is afull, clear, and exact description, reference being had to theaccompanying drawings, and to the letters of reference marked thereon.

Our present invention has relation to ventilators, such as are employedin connection with cars for the purpose of producing an exhaustion offoul air or gases therefrom; but our improved device may be employed inother situations as well as upon cars for producing like exhaustingeffects.

The object of our invention is to produce a simple, compact, andefficient ventilator or ventilating apparatus which may be operated bywind or air currents to which it is exposed, either when at restasbypassing wind or air currents-01 when it is moved or carried rapidlythrough the air, or under both circumstances combined,which ventilatorshall be capable of producing apositive, rapid, and thoroughexhaustionof air or gases from the compartment to be ventilated by mechanicalmeans, and which shall operate easily, noiselessly. with littlefriction,in whichever direction the car may be moving or the windblowing, and without interfering with the natural outflow of air or gasfrom the car, &c.,

a hen the car is at rest or when the exhaust fan is not being propelledby currents from the exterior.

To accomplish all of this,our improvements involve certain new anduseful arrangements or combinations of parts and peculiarities ofconstruction, as will be herein first fully de scribed, and then pointedout in the claims.

In the accompanying drawings, forming part of this specification, wehave shown at Figure 1 an axial section and elevation of our improveddevice as it appears when arranged to draw air or gas from the side.Fig. 2 is a plan of the underside of the apparatus, showing especiallythe power-wheel. Fig. 3 is a section through the casing and a planshowing the exhaust-fan. Fig. etisaview in elevation,

on a smaller scale than previous figures, show ing one manner ofapplying the ventilator on or in connection with a car.

In all these figures like letters of reference, wherever they occur,indicate corresponding parts.

Ais the main shell of the apparatus, which is of general cylindricalform and is intended to stand or be supported in an upright position. Itis separated into two compartments by a partition, B, located near thecentral part of the main shell.

C is the vertical shaft located in the axis of the shell, sustained atbottom by a spider or frame, D, and at top by a similar spider or frame,E. The power-fan and the exhaustfan are both keyed on this shaft, and inorder that the fans may be turned easily suitable self-oiling orequivalent boxes or bearings, as at a I), may be employed in connectionwith the shaft.

F is the power-wheel. This is made with curved blades, after the mannerof a turbinewheel, so as to utilize the force of incoming currents tobest advantage. It is keyed to the shaft as by'a screw or pin, 0, sothat it may be adjusted up or down or removed when required, and islocated in one of the compartments into which the main shell is divided.The curvature ofthe blades is such that the aircurrents first striketheir outer portions to turn the fan and are then deflected downwardlyand discharged rapidly through the open end of the shell. To direct thecurrents upon the fanblades with sufficicnt force and volume, we placeupon the exterior of the shell two open funnels or accumulators anddirectors, G G. The outer lines of these are about tangent to thesurface of the shell,and the inner lines inclined to the outer aboutasshown in the plan, Fig. 2, so that the currents gathered by them areconcentrated and directed toward the outer rim of the power-fan in amanner which will be readily understood.

It is plain that if the ventilator ismoved in either direction one ofthe mouths G will gather and direct the air so as to turn the fan. Thenthe car is at rest,the mouths G will direct wind-currents from theexterior upon the fan. H is the exhaustfan,which,beingkeyed to thevertical shaft, must turn with it. The blades of this fan are plain, butinclined all in the same direction, so that as the fan is revolvedrapidly it will cause air or gas to approach the fan to be expelledtherefrom, and thus accomplish the desired exhausting effects. The fanII is located in the remaining compartment, and is keyed to the shaft asby key or pin d, so that it may be adjusted or removed.

In the example shown foul air or gases are admitted at one side of thecompartment eon taining the exhaust-fan through an opening, I. Thisopening does not communicate with the other compartment, but is placedin communieation with the car or room desired to be ventilated by anysuitable collar or pipe. The latter is preferably round, for convenienceof construction, and may extend on the outside below the partition inthe shell, or it may be made to correspond in form with the openingthrough the shell.

Over the shell is a hood or canopy, K, perforated as at e e,throughwhich perforations the exhausted air or gases are expelled. Theseperforations are guarded by a vertical ring or band, L, which preventsdirect currents from passing in from the exterior, and further guardedabove and below by flanges, as ff, which operate to deflect inclinedcurrents, the arrangement being such as to prevent exterior air-currentsfrom interfering with the discharge from the shell, but rather to aidsuch discharge.

The improved ventilator may be mounted upon a car, as shown in Fig. 4,occupying but little space and neither projecting above the top orbeyond the side. A slight movement ofthe car is always sufflcient topropel the fans, and under no circumstances can there be anyback-pressure tending to interfere with the proper operation of thedevice. It may be located in other situations, as well as upon the roof.For instanee,it may be located under the car, in which case the hood isdispensed with and the exhaust-fan reversed on the shaft to draw foulair down through the top and discharge it through the side of the shell.

The device, being constructed and arranged in accordance with theforegoing explanations, is found to admirably answer the purpose orobject of the inventiomas previously set forth.

Having now fully described our invention, what we claim as new, anddesire to secure by Letters Patent, is-

1. In a ventilator of the character herein set forth, the power-fan andexhaust-fan mounted on the same shaft in a shell divided into twocompartments,said shell being provided on its exterior with the openprojecting funnels turned in opposite directions forcollecting anddirecting air-currents, and having separateinlet-openings and separatedischarge-openings or outlets, the parts being combined and arrangedsubstantially as shown.

2. In a ventilator of the character herein set forth, thecombination,with the shell containing the power-fan and exhaust-fan, ofthe exterior projecting funnels turned in opposite directions,andtheperforatedhood andinclined flanges, substantially as shown anddescribed.

3. In a ventilator of the character herein set forth, the combination,with the shell having the projecting funnels turned in oppositedirections and the hood and inclined flanges, of the vertical shaft, thetwo fans located in separate compartments of the main shell,the saidfans being keyed to the shaft and reversible thereon, substantially asand for the purposes set forth.

In testimony that we claim the foregoing we have hereunto set our handsinthe presence of two witnesses.

GEORGE A. PRIOHARD. EUSEBE MIGNAULT. Witnesses:

JOHN BUOKLER, WORTH Oseoon.

